--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.aarch64/src/org/graalvm/compiler/hotspot/aarch64/AArch64HotSpotReturnOp.java 2017-02-15 16:58:52.829332058 -0800 @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.hotspot.aarch64; + +import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL; +import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; +import static jdk.vm.ci.aarch64.AArch64.lr; +import static jdk.vm.ci.code.ValueUtil.asRegister; + +import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; +import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; +import org.graalvm.compiler.lir.LIRInstructionClass; +import org.graalvm.compiler.lir.Opcode; +import org.graalvm.compiler.lir.asm.CompilationResultBuilder; + +import jdk.vm.ci.meta.Value; + +/** + * Returns from a function. + */ +@Opcode("RETURN") +public final class AArch64HotSpotReturnOp extends AArch64HotSpotEpilogueOp { + + public static final LIRInstructionClass TYPE = LIRInstructionClass.create(AArch64HotSpotReturnOp.class); + + @Use({REG, ILLEGAL}) private Value result; + private final boolean isStub; + + public AArch64HotSpotReturnOp(Value result, boolean isStub, GraalHotSpotVMConfig config) { + super(TYPE, config); + assert validReturnValue(result); + this.result = result; + this.isStub = isStub; + } + + private static boolean validReturnValue(Value result) { + if (result.equals(Value.ILLEGAL)) { + return true; + } + return asRegister(result).encoding == 0; + } + + @Override + public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { + final boolean emitSafepoint = !isStub; + leaveFrame(crb, masm, emitSafepoint); + masm.ret(lr); + } +}